Don't you think the outside measurments would be a waste of time without taking into account shell thickness? Then you will need to seperate the yoke (weight and size) to see how that affects the overall dimensions of the shell.

I have been getting some exceptionally large eggs lately. I thought they would be double yokers but they weren't. Here is a picture of a couple of huge eggs next to some regular eggs. I wish I would have put something next to them like a quarter for a size comparison.